Linked Life Data

283430

Source:http://linkedlifedata.com/resource/pubmed/id/283430

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
1979-4-25
pubmed:abstractText
In a study of autonomic reflexes it was found that some produce a generalized, bilaterally uniform response whereas others have an asymmetric or laterality of action. Recordings from vertebral nerve fibers (mainly vasoconstrictors to forelimb muscles), right and left cardiac sympathetics, and renal nerves show that baroreceptors evoke a bilaterally uniform inhibition but chemoreceptors of the carotid sinus and aortic arch initiate a differential discharge. In the chemoreceptor reflex the vagi are activated and bradycardia generally occurs. Vertebral and renal sympathetic fibers increase their activity bilaterally commensurate with the increase in arterial pressure. Sympathetic discharges to the heart, however, are not uniform; they show ipsilateral inhibition and a strong contralateral increase in activity. Stabilization of blood pressure or inactivation of baroreceptors abolishes the ipsilateral inhibition. In isolation, therefore, the chemoreceptor-induced cardiac sympathetic discharge is just quantitatively stronger contralaterally. In the absence of vagi, heart rate changes differ depending on which chemoreceptors are stimulated, because the pacemaker is on the right. Asymmetrical discharges do occur and, in the eventual response to stimulation of chemoreceptors, reflex interactions actually augment the laterality of effects. Peripheral interactions, in the sense that changes effected by one may induce another reflex, are responsible in part for the balances of autonomic activity ultimately seen as the body reacts to stimuli.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-1125778, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-1155130, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-12976146, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-13884147, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-15395011, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-4174609, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-4337983, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-4420403, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-4431565, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-4930497, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-5540901, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-589463, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-678988, http://linkedlifedata.com/resource/pubmed/commentcorrection/283430-957256
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:volume
75
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5239-43
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1978
pubmed:articleTitle
Nature of differential sympathetic discharges in chemoreceptor reflexes.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.